package info.touret.winecellar.servlet;

import info.touret.winecellar.userinfo.server.domain.UserInfo;
import info.touret.winecellar.userinfo.shared.UserException;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

/**
 * Servlet Filter implementation class AuthorizationFilter
 */
public class AuthorizationFilter implements Filter {

	/**
	 * Default constructor.
	 */
	public AuthorizationFilter() {
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		if (!UserInfo.isCurrentUserAuthorized()) {
			throw new UserException();
		} else {
			chain.doFilter(request, response);
		}
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
